*{
    margin: 0;
    padding: 0;
}
.content{
    width:600px;
    height:400px;
    position: relative;
    margin:auto;
}

#list img:not(:first-child){
    display: none;
}
#btns{
   position: absolute;
   z-index: 101;
    transform: translateX(-50%);
    bottom: 20px;
    left:50%;
}
#btns .current{
     background:orangered;

}
#list img,#prev,#next,#btns{
    position: absolute;
}
#btns > span{
    width: 20px;
    height: 20px;
    display: block;
    float: left;
    border-radius: 50%;
    border: 1px solid #fff;
    background-color:rgba(44,44,44,.3);
    margin: 5px;
}
#prev,#next{
    cursor: pointer;
    top:50%;
    transform: translateY(-50%);
    z-index: 100;
    width:40px;
    height:70px;
    background: url("../images/icon-slides.png");
    border:none;
}
#prev{
    background-position-x:-86px;
}
#prev:hover{
    background-position: 0;
}
#next:hover{
    background-position-x: -43px;
}
#next{
    right:0;
    background-position-x:-125px;
}

